Recently committed to the 2.6 kernel were enhancements from Al Viro
that enabled the Sparse source code checking tool to check for a
certain class kernel bugs. This class of bugs can lead to privilege
escalation vulnerabilities. Some of these fixes also apply to the 2.4
kernel and have been backported:
1. Direct write to a user-supplied address which can lead to privilege
escalation in the mpu401 and pss sound drivers.
2. Direct read of a user-supplied address can cause information leak
from kernel memory in the airo wireless driver, and the mpu401 and pss
3. Deadlock in the msnd sound driver.
An errata has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.